Android - Chat - Missing scroller in chat report

[mitarachim]

If you haven’t already, check out our contributing guidelines for onboarding and email contributors@expensify.com to request to join our Slack channel!

---

Version Number: 9.3.60-0
Reproducible in staging?: Yes
Reproducible in production?: No
If this was caught during regression testing, add the test name, ID and link from BrowserStack: #85114
Email or phone of affected tester (no customers): soidnjsoidjoisjdiosj@gmail.com
Issue reported by: Applause Internal Team
Bug source: Exploratory - Significant User Experience Deterioration
Device used: Samsung Galaxy S25 FE / Android 16
App Component: Chat Report View

Action Performed:

1. Launch Expensify app.
2. Open a long chat.
3. Scroll the report.

Expected Result:

Scroller will be present.

Actual Result:

Scroller is missing.

Workaround:

Unknown

Platforms:

• Android: App
• Android: mWeb Chrome
• iOS: App
• iOS: mWeb Safari
• iOS: mWeb Chrome
• Windows: Chrome
• MacOS: Chrome / Safari

Screenshots/Videos

Bug7131091_1776313891149.Screen_Recording_20260416_122903_Expensify.mp4

View all open jobs on GitHub

Issue Owner

Current Issue Owner: @VickyStash

[melvin-bot]

You have been assigned to this deploy blocker because you recently merged this PR: #85114

[melvin-bot]

💬 A slack conversation has been started in #expensify-open-source

[github-actions]

👋 Friendly reminder that deploy blockers are time-sensitive ⏱ issues! Check out the open `StagingDeployCash` deploy checklist to see the list of PRs included in this release, then work quickly to do one of the following:

1. Identify the pull request that introduced this issue and revert it.
2. Find someone who can quickly fix the issue.
3. Fix the issue yourself.

[OSBotify]

Investigation Summary - Classification: Frontend bug. Causing PR: #85114 (Migrate main chat to FlashList with inverted flag) by @VickyStash, High confidence. Recommendation: REVERT. PR 85114 deliberately hides the scroll indicator on Android as a workaround for a known FlashList issue with inverted lists (getShowScrollIndicator returns false in index.android.ts), directly causing the missing scroller regression. The issue only reproduces on staging (not production), confirming this was introduced in the current deploy cycle. The affected file is src/components/FlashList/InvertedFlashList/getShowScrollIndicator/index.android.ts, which was introduced by PR 85114. Assigned: @VickyStash (author), @situchan, @Julesssss, @mountiny (approving reviewers). Labels: DeployBlockerCash kept.